Reflux type water meter water inlet check valve

Abstract

The invention discloses a reflux type water meter water inlet check valve. The valve comprises a valve body, stopping blocks and a valve chamber, the valve chamber comprises a liquid inlet and a liquid outlet, a mounting hole is formed in the upper portion of the valve body, a baffle is fixedly connected to the upper end of the mounting hole, a flange is fixedly connected to the upper side of thebaffle, the mounting hole communicates with the valve chamber, a fixing plate is fixedly connected into the liquid inlet, a plurality of through holes are formed in the fixing plate, the plurality ofstopping blocks are fixedly connected to the right side wall of the fixing plate, a filtering piece is arranged in the liquid inlet, connecting blocks are fixedly connected to the joints of the liquidinlet and the liquid outlet, internal threads are arranged in the two connecting blocks, an opening is formed in the lower end of the valve body, a guide pipe is fixedly connected into the opening, and a sealing piece is arranged in the guide pipe. According to the valve, by arranging the filtering piece, redundant impurities in a medium can be filtered out, and the situation that closing of thestopping blocks is affected by the impurities is avoided; and by arranging the guide pipe and the sealing piece, the effect of cleaning the stopping blocks can be achieved, and the water quality is prevented from being influenced.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a backflow type water meter water inlet check valve. Background technique [0002] Check valve refers to a valve whose opening and closing parts are circular stoppers, which act by their own weight and medium pressure to block the backflow of the medium. It belongs to the category of automatic valves, and can also be called check valves, one-way valves, return valves or isolation valves. The movement mode of the stopper is divided into lift type and swing type. The lift check valve is similar in structure to the globe valve, except that it lacks the valve stem that drives the stopper. The medium flows in from the inlet port (lower side) and flows out from the outlet port (upper side). When the inlet pressure is greater than the sum of the block weight and its flow resistance, the valve is opened. Conversely, the valve is closed when the medium flows backwards. The swing check...

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Problems solved by technology

[0003] The check valve in the prior art is directly installed at the water inlet of the water meter. Generally, the check valve in the prior art is inconvenient to disassemble after installation, and cannot be disassembled directly on the pipeline. When the pipeline fails, it is more expensive. Manpower and material resources; and after the check valve is installed, the medium will have some granular impurities in the flow process, and the granular impurities will affect the closure of the stopper

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